X’MAS TREE X’mas tree is a key equipment to control the pressure in wellhead and adjust the flowrate of oil/gas well in oil/gas production operation, It can be designed into general or integral structure as required, It can be completed with pneumatic/hydraulic safety valve, It can be classified into two kinds of the single-wing and the dual-wing, As required,matched choke may be positive choke or adjustable choke alternatively.